This limited edition timepiece is clad in a 44mm 18K White Gold case, and is limited to only 25 pieces – the age at which Julius Assmann founded his watch manufacture.

The watch features the Calibre 100-14, which has two barrels and bi-directional 21k gold rotor.

The watch also features a big date complication, small seconds complication, and power reserve indicator.

The Senator Observer Limited Edition 1911 – Julius Assmann features a cylindrical case fashioned in white gold, complemented by a brown calfskin strap evocative of the age of pioneering adventurers and explorers epitomized by Amundsen. The case back, engraved with the limited edition number, frames an antireflective sapphire crystal bearing the dates of Amundsen’s arrival at the South Pole and its centennial anniversary: 14 Dec.

At the heart of the Senator Observer 1911 – Julius Assmann is the automatic Caliber 100-14 self-winding movement.

Traditional observation watches used hand-wound movements; Glashütte Original has chosen to outfit the Senator Observer 1911 – Julius Assmann with a contemporary automatic movement to maximize comfort for the wearer.

Thus, the ‘Ab Auf’ indicator on the dial represents a true power reserve, rather than a simple indication of running time.

The base movement is outfitted with a zero-reset mechanism, which makes for easier synchronization of the second hand with standard time.

In contrast to other reset mechanisms, the second hand is not coupled with the winding stem or the crown, allowing the balance to continue oscillating and the movement to continue running with the crown pulled out, reducing wear and tear on materials.

The reset mechanism is activated by pushing a separate corrector.

A bi-directional winding rotor delivers energy to a patented, stepped reduction gear, and then to two smaller, serially operating spring barrels.

Large amounts of energy are transmitted to the mainspring, and the spring barrels are filled quickly.

Visible through the sapphire case back, the Caliber 100-14 is a fitting tribute to Julius Assmann.

The movement features the characteristic Glashütte three-quarter plate, screw-mounted gold chatons, and a rotor with 21-carat gold oscillating weight and the gold-plated double-G mark that distinguishes mechanical watches from Glashütte Original.